Pinhead vs gazump

Pinhead

noun
  • A member of the Provisional IRA. 

gazump

noun
  • The act of gazumping. 

  • A politician who takes bribes. 

verb
  • To trump or preempt; to reap the benefit underhandedly from a situation that someone else has worked to create. 

  • To buy a property by bidding more than the price of an existing, accepted offer. 

  • To raise the selling price of something (especially property) after previously agreeing to a lower one. 

  • To swindle; to extort. 

How often have the words Pinhead and gazump occurred in a corpus of books? (source: Google Ngram Viewer )